Need Help for buying ram

[s4gk]

MY pc spec:
AMD Phenom(tm) II X2 560 Processor
Mainboard GA-78LMT-S2P
DDR3 1333MHz Transcend 4 GB

I want to buy a ram which would run side by side with my current one. which brand would be better?
Transcend is quite expensive.

Thank You.

[Ehsas]

Well other brands would also work, but just go with the transcend one, the price difference is minimal, just be sure that you get a DDR3 1333mhz one, your motherboard won't support any over that frequency.

[Sybaris Caesar]

try to get the same one.